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. 2016 Aug 18;11(8):e0161219. doi: 10.1371/journal.pone.0161219

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© 2016 Cao et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 4 — There was no publication bias and the results are credible. (4a) Begg’s test of HER3 overexpression and OS (P = 0.14). (4b) Egger’s test of HER3 overexpression and OS (P = 0.15). (4c) Begg’s test of HER4 overexpression and OS (P = 0.12). (4d) Egger’s test of HER4 overexpression and OS (P = 0.17).